EP2343925A1 - Selective support and establishment of emergency services in home cells - Google Patents

Selective support and establishment of emergency services in home cells Download PDF

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Publication number
EP2343925A1
EP2343925A1 EP10187052A EP10187052A EP2343925A1 EP 2343925 A1 EP2343925 A1 EP 2343925A1 EP 10187052 A EP10187052 A EP 10187052A EP 10187052 A EP10187052 A EP 10187052A EP 2343925 A1 EP2343925 A1 EP 2343925A1
Authority
EP
European Patent Office
Prior art keywords
cell
emergency
femtocell
indication
emergency services
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10187052A
Other languages
German (de)
English (en)
French (fr)
Inventor
David P. Hole
Stefano M. Faccin
Young Ae Kim
Johanna L. Dwyer
Mo-Han Fong
Muhammad Khaledul Islam
Paul Carpenter
Maiyuran Wijayanathan
Jeffrey William Wirtanen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Research in Motion Ltd filed Critical Research in Motion Ltd
Publication of EP2343925A1 publication Critical patent/EP2343925A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • MSC Mobile Switching Center
  • emergency services for example, the possibility to establish a connection for the purpose of making an emergency call
  • an indication is provided to the UE that reliability of those services is not guaranteed or that those services are substantially less reliable than the equivalent services when provided by another cell or network.
  • the UE in the event of femtocell congestion, the UE may be capable of reselecting to a macro cell without needing to be handed over by the network, and the UE may be made aware of existing cell congestion.
  • a reselection algorithm may be specified to allow operators greater flexibility over the relative priorities of different cells for individual users, when considering preferences among different cells which are candidates for autonomous reselection.
  • This algorithm may apply to E-UTRAN, UTRAN, and GERAN networks, and possibly other networks.
  • This reselection algorithm might not apply when considering reselection to femtocells.
  • the priority-based reselection algorithm may specify, for a UE which is permitted to perform autonomous reselection and is currently camped on a cell from one group, whether the mobile should reselect to a cell of a different group.
  • An operator may limit or manage its risk in this regard because the operator owns and controls not only the base stations, but also the radio access network and the core network.
  • the base stations, the radio access network, and the core network are owned by another party, such as a third party operator, an agreement may exist between the providing operator and the third party operator regarding which party assumes liability for a failed or dropped emergency call.
  • H(e)NBs may be located in the user's home.
  • the H(e)NB may be located at an enterprise or on a campus.
  • the femtocell operator may deploy the H(e)NB to improve the coverage or to provide value added services, such as local IP access, within the coverage.
  • These individuals or organizations may not wish to assume liability for emergency calls.
  • emergency services might be provided, but an indication may be provided that reliability of those services is not guaranteed.
  • ECSI Emergency Calls Supported Indicator
  • ECRI Emergency Calls Required Indicator
  • the network may indicate support of limited emergency services by providing to the UE the ECSI with a value indicating that only limited emergency services are supported.
  • the UE may require a specific set of emergency services by providing an ECRI to the network.
  • the owner of the femtocell may decide to set the ECSI to indicate that only limited emergency services are supported if, for example, the owner does not want to assume liability in case of failure of emergency calls established over the femtocell.
  • This embodiment addresses the third problem described above, though this embodiment may also be used with other embodiments described herein to address other issues described above.
  • the cell reselection process may be performed according to a priority-based cell reselection algorithm.
  • One illustrative reselection may be as follows.
  • the signal quality of the serving cell may be considered to be below the applicable threshold.
  • S_serving may be less than Thresh_serving, regardless of the actual value of S_serving.
  • the UE might not perform intra-frequency reselection, but rather behave as if the UE has no priority assigned for that frequency or for other frequencies known to be used only by femtocells.
  • the UE may make use of any PCI/PSC split information the UE has stored to avoid performing cell reselection to a femtocell, whether using intra-frequency or inter-frequency cell reselection.
  • the ECSI may be provided to the UE upon the initial attach procedure, upon performing a RAU procedure for GERAN/UTRAN, or upon performing a TAU procedure for LTE.
  • the ECSI may be provided if the UE performs a RAU or TAU procedure when moving to the femtocell, whether the UE is in idle mode or the UE is undergoing a handover procedure.
  • the RAU and TAU procedures might not be performed when the UE selects the femtocell, because the femtocell might not be in a separate RA or TA with respect to the previous serving cell.
  • the first sub-issue regarding providing the ECSI in NAS signaling is the UE deciding where to attach.
  • the UE may be configured to know whether to establish emergency calls in a femtocell when only limited emergency services are available in the femtocell. This configuration may be made by femtocell operator or by the user.
  • TAU accept message Another message that may be sent is a TAU accept message.
  • This message may be sent by the network to the UE to provide the UE with EPS mobility management related data in response to a tracking area update request message.
  • the following table shows an example of a TAU accept message.
  • Another UE state may be the EMM-REGISTERED state. This state may also be subdivided into a number of sub-states.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Public Health (AREA)
  • Mobile Radio Communication Systems (AREA)
EP10187052A 2010-01-12 2010-10-08 Selective support and establishment of emergency services in home cells Withdrawn EP2343925A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/686,244 US20110171924A1 (en) 2010-01-12 2010-01-12 Selective Support and Establishment of Emergency Services in Home Cells

Publications (1)

Publication Number Publication Date
EP2343925A1 true EP2343925A1 (en) 2011-07-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10187052A Withdrawn EP2343925A1 (en) 2010-01-12 2010-10-08 Selective support and establishment of emergency services in home cells

Country Status (5)

Country Link
US (1) US20110171924A1 (zh)
EP (1) EP2343925A1 (zh)
CN (1) CN102934487A (zh)
CA (1) CA2786033A1 (zh)
WO (1) WO2011088066A1 (zh)

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Also Published As

Publication number Publication date
US20110171924A1 (en) 2011-07-14
WO2011088066A1 (en) 2011-07-21
CN102934487A (zh) 2013-02-13
CA2786033A1 (en) 2011-07-21

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